Diesel-storage hybrid energy supply control method for drilling operation

Abstract

The invention discloses a diesel-storage hybrid energy supply control method for drilling operation, which belongs to the technical field of petroleum and natural gas drilling, and is characterized by comprising the following steps: S1, under the working condition of tripping operation, when an energy storage system is fully charged and the number of on-line running diesel generator sets is greater than or equal to 2, stopping one diesel generator set, and stopping the operation of the diesel generator set when the number of the on-line running diesel generator sets is greater than or equal to 2; the energy storage system and the remaining running diesel generating sets are jointly loaded, and first control logic is executed; s2, under the working condition of drill changing operation, when the load rate of the diesel generating set is lower than 30%, the diesel generating set charges the energy storage system, a second control logic is executed, and when the energy storage system is charged, the original operation mode is kept; and S3, supplying power to the living quarters through the energy storage system under the working condition that drilling operation is stopped. Aiming at the special working condition of low load or high load, a good hybrid energy supply effect can be achieved, and the stability of the system is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of oil and gas drilling, and particularly relates to a control method for hybrid power supply of diesel storage for drilling operations. Background Art

[0002] At present, the power source for oil and gas drilling still mostly comes from diesel generator sets, resulting in a large consumption of diesel. In addition, during special working conditions, it is necessary to start the diesel generator additionally to prevent insufficient power supply in case of emergencies.

[0003] Chinese patent document with the publication number CN116335625A and the publication date of June 27, 2023 discloses a hybrid power system for oil rigs based on an energy storage system and its optimal control method. The system includes: A power supply subsystem for supplying electrical energy to the control subsystem and the drive subsystem; A control subsystem for controlling the operation mode and the coordinated operation mode of the oil rig using a power management PMS; A drive subsystem for controlling the driving of the oil rig to perform drilling operations based on the operation mode and the coordinated operation mode; An energy storage subsystem for storing or releasing electrical energy in real time in a low-load interval by using an alternating power supply method between a battery pack and a generator set based on the operation mode and the coordinated operation mode.

[0004] The optimal control method includes the following steps: S1. Generate alternating current using a generator set to supply power to the hybrid power system of the oil rig; S2. Convert the fixed-frequency alternating current into a variable-frequency power supply using an inverter in the transmission unit, and control the operation of the mud pump, winch, and top drive motor through the variable-frequency power supply; S3. Determine whether the energy storage subsystem is operating. If so, proceed to step S4; otherwise, return to step S1; S4. Calculate the power of the energy storage subsystem participating in the optimal control to obtain an optimal given value; S5. Start the energy storage subsystem to execute the optimal given value to complete the optimal control of the hybrid power system of the oil rig.

[0005] The hybrid power system for oil rigs based on an energy storage system and its optimal control method disclosed in this patent document solve the problems of low power generation efficiency and incomplete combustion of pollutants in the original hybrid power system of the oil rig. However, for special working conditions such as low load or high load, a good hybrid power supply effect still cannot be achieved, affecting the stability of the system. Summary of the Invention

[0006] In order to overcome the defects of the above-mentioned prior art, the present invention provides a control method for diesel-reserve hybrid power supply for drilling operations. The present invention can achieve good hybrid power supply effect and ensure system stability for special working conditions such as low load or high load.

[0007] The present invention is realized through the following technical solutions: A control method for diesel-reserve hybrid power supply for drilling operations, characterized by comprising the following steps: S1. Under the hoisting and tripping operation condition, when the energy storage system is fully charged and the number of online-operating diesel generator sets is greater than or equal to 2, one diesel generator set is shut down, and the energy storage system and the remaining operating diesel generator sets jointly carry the load, and the first control logic is executed; S2. Under the drill changing operation condition, when the load rate of the diesel generator set is lower than 30%, the diesel generator set charges the energy storage system, and the second control logic is executed. When the energy storage system is charging, the original operation mode is maintained; S3. Under the waiting condition during drilling operations, the energy storage system supplies power to the living area.

[0008] In the above S2, maintaining the original operation mode means that the number of started and stopped diesel generator sets remains unchanged, and the energy storage system adjusts the charging power according to the load rate of the diesel generator set.

[0009] In the above S1, the first control logic specifically includes: T11. When the load rate N of the diesel generator is greater than 70%, it is judged whether the energy storage system is in the operating VSG mode; T12. Judge whether B / A is greater than 1, where B is the total real-time load power and A is the sum of the rated available capacity of the energy storage system and the total online capacity of the diesel generators; T13. Judge whether B / A is greater than 0.75. If B / A is greater than 0.75, then judge whether SOC is less than 0.3 or judge whether B / A is still greater than 0.75 after a 30-second delay; if SOC is less than 0.3 or B / A is still greater than 0.75 after a 30-second delay, then start n + 1 diesel generators, where SOC is the available power of the energy storage system; if SOC is greater than 0.3 or B / A is less than 0.75 after a 30-second delay, then maintain the status quo; if B / A is less than 0.75, then execute T14; T14. Judge whether B / A is less than 0.5; T15. Judge whether B / A has been continuously less than 0.5 for 10 seconds. If so, control the energy storage system to exit the VSG mode; if not, maintain the status quo.

[0010] In the above T11, if the energy storage system is in the operating VSG mode, then maintain the status quo and execute T12; if the energy storage system is not in the operating VSG mode, then start the VSG mode and execute T12.

[0011] In T12, if B / A is greater than 1, start n + 1 diesel generators; if B / A is less than 1, execute T13.

[0012] In T14, if B / A is less than 0.5, execute T15; if B / A is greater than 0.5, maintain the current status.

[0013] In S2, the second control logic specifically includes: T21. When the load factor N of the diesel generator is less than 70%, determine whether the energy storage system is in the operating VSG mode; T22. Determine whether the load factor N of the diesel generator is less than 30%. If the load factor N is less than 30%, then after a delay of 60 s, determine whether the load factor N is still less than 30%. If the load factor N is still less than 30% after a delay of 60 s, then execute T23; if the load factor N is greater than 30% after a delay of 60 s, then maintain the current status; if the load factor N is greater than 30%, then maintain the current status; T23. Determine whether the number of on - line diesel generators is greater than 1; T24. Determine whether the SOC is less than 0.8.

[0014] In T21, if the energy storage system is in the operating VSG mode, stop the VSG operating mode and execute T22; if the energy storage system is not in the operating VSG mode, maintain the current status and execute T22.

[0015] In T23, if the number of on - line diesel generators is greater than 1, withdraw one diesel generator; if only one diesel generator is operating, execute T24.

[0016] In T24, if the SOC is less than 0.8, execute the charging of the energy storage system; if the SOC is greater than 0.8, maintain the current status.

[0017] The VSG referred to in the present invention means a virtual synchronous generator.

[0018] The load factor N referred to in the present invention means the real - time load of the diesel generator / 1200 kW × the number of diesel generators.

[0019] The beneficial effects of the present invention are mainly manifested in the following aspects: 1. For the present invention, in the operation condition of tripping in and out of the well, when the energy storage system is fully charged and the number of on-line operating diesel generator sets is greater than or equal to 2, one diesel generator set is shut down, and the energy storage system and the remaining operating diesel generator sets jointly carry the load, and the first control logic is executed; S2. In the operation condition of changing the drill, when the load rate of the diesel generator set is lower than 30%, the diesel generator set charges the energy storage system, and the second control logic is executed. When the energy storage system is charging, the original operation mode is maintained; S3. In the waiting condition of drilling operation and other conditions, the energy storage system supplies power to the living area. As a complete technical solution, compared with the prior art, in the special conditions of low load or high load, a good hybrid energy supply effect can be achieved to ensure the stability of the system.

[0020] 2. For the present invention, by controlling the charge and discharge time and charge and discharge power of the energy storage system and adjusting the output power of the diesel generator, the unit fuel consumption can be effectively reduced, the power quality can be improved, and the drilling production cost can be reduced.

[0021] 3. For the present invention, a diesel-electricity storage hybrid energy supply control method is adopted. By introducing an energy storage system, the energy storage system operates in the VSG mode and operates jointly with the diesel generator set, which can effectively absorb the step load of the system and achieve good fuel-saving effects and system stability.

[0022] 4. For the present invention, in the operation condition of tripping in and out of the well, the load fluctuates frequently. Through the joint load carrying of the energy storage system and the remaining operating diesel generator sets, the intervention of the energy storage system can effectively absorb the step load and ensure the smooth operation of the drilling operation.

[0023] 5. For the present invention, in the operation condition of changing the drill, the average load rate of the diesel generator set is low, the load fluctuates greatly, and the unit fuel consumption is high. The diesel generator set can charge the energy storage system to achieve good fuel-saving effects.

[0024] 6. For the present invention, in the waiting condition of drilling operation and other conditions, that is, during non-production time, the energy storage system can supply power to the living area to ensure the living power demand and save the drilling operation cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The present invention will be further specifically described below in conjunction with the specification drawings and specific embodiments: Figure 1 is the flow block diagram of the present invention; Figure 2 is the control logic diagram of the diesel generator and energy storage hybrid energy supply of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0026] Embodiment 1 See Figure 1 , a diesel-electricity storage hybrid energy supply control method for drilling operations, including the following steps: S1. Under the operation conditions of tripping in and out of the drill pipe, when the energy storage system is fully charged and the number of on-line operating diesel generator sets is greater than or equal to 2, one diesel generator set is shut down, and the energy storage system and the remaining operating diesel generator sets jointly carry the load, and the first control logic is executed; S2. Under the operation conditions of changing the drill, when the load rate of the diesel generator set is lower than 30%, the diesel generator set charges the energy storage system, and the second control logic is executed. When the energy storage system is charging, the original operation mode is maintained; S3. Under the waiting conditions such as drilling operation, the energy storage system supplies power to the living area.

[0027] This embodiment is the most basic implementation mode, and the energy storage system adopts the energy storage system of the existing technology. For special working conditions such as low load or high load, a good hybrid power supply effect can be achieved to ensure the stability of the system.

[0028] Embodiment 2 See Figure 1 , a diesel-electric hybrid power supply control method for drilling operations, comprising the following steps: S1. Under the operation conditions of tripping in and out of the drill pipe, when the energy storage system is fully charged and the number of on-line operating diesel generator sets is greater than or equal to 2, one diesel generator set is shut down, and the energy storage system and the remaining operating diesel generator sets jointly carry the load, and the first control logic is executed; S2. Under the operation conditions of changing the drill, when the load rate of the diesel generator set is lower than 30%, the diesel generator set charges the energy storage system, and the second control logic is executed. When the energy storage system is charging, the original operation mode is maintained; S3. Under the waiting conditions such as drilling operation, the energy storage system supplies power to the living area.

[0029] In the above S2, maintaining the original operation mode means that the number of started and stopped diesel generator sets remains unchanged, and the energy storage system adjusts the charging power according to the load rate of the diesel generator set.

[0030] This embodiment is a preferred implementation mode. By controlling the charge and discharge time and power of the energy storage system and adjusting the output power of the diesel generator, the unit fuel consumption can be effectively reduced, the power quality can be improved, and the drilling production cost can be reduced.

[0031] Embodiment 3 See Figure 1 , a diesel-electric hybrid power supply control method for drilling operations, comprising the following steps: S1. Under the operation conditions of tripping in and out of the drill pipe, when the energy storage system is fully charged and the number of on-line operating diesel generator sets is greater than or equal to 2, one diesel generator set is shut down, and the energy storage system and the remaining operating diesel generator sets jointly carry the load, and the first control logic is executed; S2. Under the condition of drill bit replacement operation, when the load rate of the diesel generator set is lower than 30%, the diesel generator set charges the energy storage system and executes the second control logic. When the energy storage system is charging, the original operation mode is maintained. S3. Under the condition of stopping operations such as drilling operations, the energy storage system is used to supply power to the living area.

[0032] In S2 above, maintaining the original operation mode means that the number of diesel generator sets started and stopped remains unchanged, and the energy storage system adjusts the charging power according to the load rate of the diesel generator set.

[0033] Further, in S1, the first control logic specifically includes: T11. When the load rate N of the diesel generator is greater than 70%, it is judged whether the energy storage system is in the operating VSG mode; T12. Judge whether B / A is greater than 1, where B is the total real-time load power and A is the sum of the rated available capacity of the energy storage system and the total online capacity of the diesel generators. T13. Judge whether B / A is greater than 0.75. If B / A is greater than 0.75, then judge whether SOC is less than 0.3 or judge whether B / A is still greater than 0.75 after a 30-second delay; if SOC is less than 0.3 or B / A is still greater than 0.75 after a 30-second delay, start n + 1 diesel generators, where SOC is the available power of the energy storage system; if SOC is greater than 0.3 or B / A is less than 0.75 after a 30-second delay, maintain the status quo; if B / A is less than 0.75, execute T14; T14. Judge whether B / A is less than 0.5; T15. Judge whether B / A has been less than 0.5 for 10 consecutive seconds. If so, control the energy storage system to exit the VSG mode; if not, maintain the status quo.

[0034] This embodiment is another preferred embodiment. By adopting the diesel-electricity hybrid energy supply control method, by introducing the energy storage system, the energy storage system works in the VSG mode and operates jointly with the diesel generator set, which can effectively absorb the step load of the system and achieve good fuel-saving effects and system stability.

[0035] Embodiment 4 See Figure 1 , a diesel-electricity hybrid energy supply control method for drilling operations, including the following steps: S1. Under the condition of tripping operation, when the energy storage system is fully charged and the number of online diesel generator sets is greater than or equal to 2, stop one diesel generator set, and the energy storage system and the remaining operating diesel generator sets jointly carry the load and execute the first control logic; S2. Under the operation condition of drill bit replacement, when the load rate of the diesel generator set is lower than 30%, the diesel generator set charges the energy storage system and executes the second control logic. When the energy storage system is charging, the original operation mode is maintained. S3. Under the stop conditions such as drilling operation, the energy storage system supplies power to the living area.

[0036] In S2 above, maintaining the original operation mode means that the number of started and stopped diesel generator sets remains unchanged, and the energy storage system adjusts the charging power according to the load rate of the diesel generator set.

[0037] In S1 above, the first control logic specifically includes: T11. When the load rate N of the diesel generator is greater than 70%, it is judged whether the energy storage system is in the operating VSG mode. T12. Judge whether B / A is greater than 1, where B is the total real-time load power and A is the sum of the rated available capacity of the energy storage system and the total online capacity of the diesel generators. T13. Judge whether B / A is greater than 0.75. If B / A is greater than 0.75, then judge whether SOC is less than 0.3 or judge whether B / A is still greater than 0.75 after a 30s delay; if SOC is less than 0.3 or B / A is still greater than 0.75 after a 30s delay, start n + 1 diesel generators, where SOC is the available power of the energy storage system; if SOC is greater than 0.3 or B / A is less than 0.75 after a 30s delay, maintain the current situation; if B / A is less than 0.75, execute T14. T14. Judge whether B / A is less than 0.5. T15. Judge whether B / A has been continuously less than 0.5 for 10s. If so, control the energy storage system to exit the VSG mode; if not, maintain the current situation.

[0038] In T11 above, if the energy storage system is in the operating VSG mode, then maintain the current situation and execute T12; if the energy storage system is not in the operating VSG mode, then start the VSG mode and execute T12.

[0039] In T12 above, if B / A is greater than 1, start n + 1 diesel generators; if B / A is less than 1, execute T13.

[0040] In T14 above, if B / A is less than 0.5, execute T15; if B / A is greater than 0.5, maintain the current situation.

[0041] This embodiment is another preferred embodiment. Under the operation condition of pipe tripping, the load fluctuates frequently. The energy storage system and the remaining operating diesel generator sets jointly carry the load. The intervention of the energy storage system can effectively absorb the step load and ensure the stable operation of the drilling operation.

[0042] Embodiment 5 See Figure 1 , a control method for diesel and energy storage hybrid power supply for drilling operations, comprising the following steps: S1. Under the working condition of tripping operations, when the energy storage system is fully charged and the number of online operating diesel generator sets is greater than or equal to 2, stop one diesel generator set, and the energy storage system and the remaining operating diesel generator sets jointly carry the load, and execute the first control logic; S2. Under the working condition of drill changing operations, when the load rate of the diesel generator set is lower than 30%, the diesel generator set charges the energy storage system, and the second control logic is executed. When the energy storage system is charging, the original operating mode is maintained; S3. Under the waiting condition during drilling operations, the energy storage system supplies power to the living area.

[0043] In the above S2, maintaining the original operating mode means that the number of started and stopped diesel generator sets remains unchanged, and the energy storage system adjusts the charging power according to the load rate of the diesel generator set.

[0044] In the above S1, the first control logic specifically includes: T11. When the load rate N of the diesel generator is greater than 70%, judge whether the energy storage system is in the operating VSG mode; T12. Judge whether B / A is greater than 1, where B is the total real-time load power and A is the sum of the rated available capacity of the energy storage system and the total online capacity of the diesel generators; T13. Judge whether B / A is greater than 0.75. If B / A is greater than 0.75, then judge whether SOC is less than 0.3 or judge whether B / A is still greater than 0.75 after a 30s delay; if SOC is less than 0.3 or B / A is still greater than 0.75 after a 30s delay, start n + 1 diesel generator sets, where SOC is the available power of the energy storage system; if SOC is greater than 0.3 or B / A is less than 0.75 after a 30s delay, maintain the status quo; if B / A is less than 0.75, then execute T14; T14. Judge whether B / A is less than 0.5; T15. Judge whether B / A has been continuously less than 0.5 for 10s. If so, control the energy storage system to exit the VSG mode; if not, maintain the status quo.

[0045] In the above T11, if the energy storage system is in the operating VSG mode, maintain the status quo and execute T12; if the energy storage system is not in the operating VSG mode, start the VSG mode and execute T12.

[0046] In the above T12, if B / A is greater than 1, start n + 1 diesel generator sets; if B / A is less than 1, execute T13.

[0047] In the above T14, if B / A is less than 0.5, then execute T15; if B / A is greater than 0.5, then maintain the current situation.

[0048] Furthermore, in the above S2, the second control logic specifically includes: T21. When the load rate N of the diesel generator is less than 70%, determine whether the energy storage system is in the operating VSG mode; T22. Determine whether the load rate N of the diesel generator is less than 30%. If the load rate N is less than 30%, then after a delay of 60 s, determine whether the load rate N is still less than 30%. If the load rate N is still less than 30% after a delay of 60 s, then execute T23. If the load rate N is greater than 30% after a delay of 60 s, then maintain the current situation. If the load rate N is greater than 30%, then maintain the current situation; T23. Determine whether the number of online diesel generators is greater than 1; T24. Determine whether the SOC is less than 0.8.

[0049] This embodiment is another preferred embodiment. In the drill pipe changing operation condition, the average load rate of the diesel generator set is low, the load fluctuation is large, and the unit fuel consumption is high. The diesel generator set can charge the energy storage system, achieving a good fuel-saving effect.

[0050] Embodiment 6 See Figure 1 , a diesel-electric hybrid energy supply control method for drilling operations, including the following steps: S1. In the drill pipe tripping operation condition, when the energy storage system is fully charged and the number of online diesel generator sets is greater than or equal to 2, stop one diesel generator set, and the energy storage system and the remaining operating diesel generator sets jointly carry the load, and execute the first control logic; S2. In the drill pipe changing operation condition, when the load rate of the diesel generator set is lower than 30%, the diesel generator set charges the energy storage system, and execute the second control logic. When the energy storage system is charging, maintain the original operation mode; S3. In the drilling operation standby condition, supply power to the living area through the energy storage system.

[0051] In the above S2, maintaining the original operation mode means that the number of started and stopped diesel generator sets remains unchanged, and the energy storage system adjusts the charging power according to the load rate of the diesel generator set.

[0052] In the above S1, the first control logic specifically includes: T11. When the load rate N of the diesel generator is greater than 70%, determine whether the energy storage system is in the operating VSG mode; T12. Determine whether B / A is greater than 1, where B is the real-time total load power and A is the sum of the rated available capacity of the energy storage system and the total online capacity of the diesel generators; T13. Determine whether B / A is greater than 0.75. If B / A is greater than 0.75, then determine whether SOC is less than 0.3 or determine whether B / A is still greater than 0.75 after a 30-second delay; if SOC is less than 0.3 or B / A is still greater than 0.75 after a 30-second delay, then start the (n + 1)th diesel generator, where SOC is the available power of the energy storage system; if SOC is greater than 0.3 or B / A is less than 0.75 after a 30-second delay, then maintain the current status; if B / A is less than 0.75, then execute T14; T14. Determine whether B / A is less than 0.5; T15. Determine whether B / A has been continuously less than 0.5 for 10 seconds. If so, then control the energy storage system to exit the VSG mode; if not, then maintain the current status.

[0053] In T11, if the energy storage system is in the operating VSG mode, then maintain the current status and execute T12; if the energy storage system is not in the operating VSG mode, then start the VSG mode and execute T12.

[0054] In T12, if B / A is greater than 1, then start the (n + 1)th diesel generator; if B / A is less than 1, then execute T13.

[0055] In T14, if B / A is less than 0.5, then execute T15; if B / A is greater than 0.5, then maintain the current status.

[0056] In S2, the second control logic specifically includes: T21. When the load factor N of the diesel generator is less than 70%, determine whether the energy storage system is in the operating VSG mode; T22. Determine whether the load factor N of the diesel generator is less than 30%. If the load factor N is less than 30%, then determine whether the load factor N is still less than 30% after a 60-second delay; if the load factor N is still less than 30% after a 60-second delay, then execute T23; if the load factor N is greater than 30% after a 60-second delay, then maintain the current status; if the load factor N is greater than 30%, then maintain the current status; T23. Determine whether the number of online diesel generators is greater than 1; T24. Determine whether SOC is less than 0.8.

[0057] In T21, if the energy storage system is in the operating VSG mode, then stop the VSG operating mode and execute T22; if the energy storage system is not in the operating VSG mode, then maintain the current status and execute T22.

[0058] In T23, if the number of online diesel generators is greater than 1, then withdraw one diesel generator; if only one diesel generator is operating, then execute T24.

[0059] In the T24, if the SOC is less than 0.8, the energy storage system is charged; if the SOC is greater than 0.8, the current state is maintained.

[0060] This embodiment is the best implementation mode. During the stop conditions such as drilling operations, that is, during non-production time, the energy storage system can supply power to the living area to ensure the living electricity demand and save the drilling operation cost.

[0061] The basic principle of the present invention is as follows: If the energy storage system and the diesel generator set jointly carry the load, the diesel generator set adopts power control, and the energy storage system serves as the main power source to provide the regulation of the platform voltage and frequency. When the energy storage system carries the load alone, a constant frequency and constant voltage control mode is adopted.

Claims

1. A control method for hybrid fuel and energy storage power supply in drilling operations, characterized in that, It includes the following steps: S1. Under the operation conditions of tripping in and out of the well, when the energy storage system is fully charged and the number of online diesel generator sets is greater than or equal to 2, one diesel generator set is shut down, and the energy storage system and the remaining operating diesel generator sets jointly carry the load, and the first control logic is executed; S2. Under the operation conditions of drill pipe changing, when the load rate of the diesel generator set is less than 30%, the diesel generator set charges the energy storage system, and the second control logic is executed. When the energy storage system is charging, the original operation mode is maintained; S3. Under the waiting conditions such as drilling operation, the energy storage system supplies power to the living area.

2. A control method for a diesel and energy storage hybrid power supply used in drilling operations according to claim 1, characterized in that: In S2, maintaining the original operation mode means that the number of started and stopped diesel generator sets remains unchanged, and the energy storage system adjusts the charging power according to the load rate of the diesel generator set.

3. A diesel-electric hybrid energy supply control method for drilling operations according to claim 1, characterized in that: In S1, the first control logic specifically includes: T11. When the load rate N of the diesel generator is greater than 70%, it is judged whether the energy storage system is in the operating VSG mode; T12. Judge whether B / A is greater than 1, where B is the total real-time load power and A is the sum of the rated available capacity of the energy storage system and the total online capacity of the diesel generators; T13. Judge whether B / A is greater than 0.

75. If B / A is greater than 0.75, then judge whether SOC is less than 0.3 or judge whether B / A is still greater than 0.75 after a 30s delay; if SOC is less than 0.3 or B / A is still greater than 0.75 after a 30s delay, then start n + 1 diesel generators, where SOC is the available power of the energy storage system; if SOC is greater than 0.3 or B / A is less than 0.75 after a 30s delay, then maintain the status quo; if B / A is less than 0.75, then execute T14; T14. Judge whether B / A is less than 0.5; T15. Judge whether B / A has been less than 0.5 for 10s continuously. If so, control the energy storage system to exit the VSG mode; if not, maintain the status quo.

4. A control method for a diesel-electric hybrid energy supply for drilling operations according to claim 3, characterized in that: In T11, if the energy storage system is in the operating VSG mode, then maintain the status quo and execute T12; if the energy storage system is not in the operating VSG mode, then start the VSG mode and execute T12.

5. A diesel storage hybrid energy supply control method for drilling operations according to claim 3, characterized in that: In T12, if B / A is greater than 1, then start n + 1 diesel generators; if B / A is less than 1, then execute T13.

6. The diesel and energy storage hybrid power supply control method for drilling operations according to claim 3, wherein: In T14, if B / A is less than 0.5, then execute T15; if B / A is greater than 0.5, then maintain the status quo.

7. A method for controlling a combined diesel and energy storage power supply for drilling operations according to claim 1, characterized in that: In S2, the second control logic specifically includes: T21. When the load rate N of the diesel generator is less than 70%, it is judged whether the energy storage system is in the operating VSG mode; T22. Judge whether the load rate N of the diesel generator is less than 30%. If the load rate N is less than 30%, then judge whether the load rate N is still less than 30% after a 60s delay; if the load rate N is still less than 30% after a 60s delay, then execute T23; if the load rate N is greater than 30% after a 60s delay, then maintain the status quo; if the load rate N is greater than 30%, then maintain the status quo; T23. Judge whether the number of online diesel generators is greater than 1; T24. Judge whether SOC is less than 0.

8.

8. A method for controlling a combined fuel and energy storage power supply for drilling operations according to claim 7, characterized in that: In the above T21, if the energy storage system is in the operating VSG mode, stop the VSG operating mode and execute T22; if the energy storage system is not in the operating VSG mode, maintain the status quo and execute T22.

9. A diesel-electric hybrid energy supply control method for drilling operations according to claim 7, characterized in that: In the above T23, if the number of online diesel generators is greater than 1, withdraw one diesel generator; if only one diesel generator is operating, execute T24.

10. A diesel-electric hybrid energy supply control method for drilling operations according to claim 7, characterized in that: In the above T24, if the SOC is less than 0.8, execute the charging of the energy storage system; if the SOC is greater than 0.8, maintain the status quo.

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